<?php
class Db
{
    var $result;
	var $default_link;
	var $master_link;
	var $active_master;
	
	/*
    function __construct($host, $user, $pass, $dbase, $port=false) {
        $this->setAccount($host, $user, $pass, $dbase, $port);
		$this->active_master = false;
    }
	*/
	
	//CONFIG------------------------------------------------------------------------------
    function setAccount($host, $user, $pass, $dbase, $port=false) {
        $this->host  = $host;
        $this->user  = $user;
        $this->pass  = $pass;
        $this->dbase = $dbase;
        $this->port  = ($port !== false)? $port : 3306;
    }
	
    function setMasterAccount($host, $user, $pass, $dbase, $port=false) {
        $this->m_host  = $host;
        $this->m_user  = $user;
        $this->m_pass  = $pass;
        $this->m_dbase = $dbase;
        $this->m_port  = ($port !== false)? $port : 3306;
    }
	
	//CONNECT-----------------------------------------------------------------------------
    function connect() {
        $host  = ($this->active_master)? $this->m_host  : $this->host;
        $user  = ($this->active_master)? $this->m_user  : $this->user;
        $pass  = ($this->active_master)? $this->m_pass  : $this->pass;
        $dbase = ($this->active_master)? $this->m_dbase : $this->dbase;
		
        $link = $this->getConnectResource($host, $user, $pass, $dbase);
		($this->active_master)? $this->master_link = $link : $this->default_link = $link;
    }
	
	function getConnectResource($host, $user, $pass, $dbase) {
		$conn = mysqli_connect($host, $user, $pass, $dbase);
        if (!$conn) {
            //ERROR PROCESS
            $error_no      = mysqli_connect_errno();
            $error_message = mysqli_connect_error();
            print "Error_Connect: {$error_no} : {$error_message}\n";
            exit();
        }
        return $conn;
	}
	
	function getConnect() {
		$this->checkConnect();
		return ($this->active_master)? $this->master_link : $this->default_link;
	}
	
	function changeMaster($flag) {
		$this->active_master = ($flag)? true : false;
	}
	
    function disconnect() {
		$conn = $this->getConnect();
        return mysqli_close($conn);
    }
	
    function checkConnect() {
		if (!$this->active_master && !$this->default_link) {
			$this->connect();
			
		} else if ($this->active_master && !$this->master_link) {
			$this->connect();
		}
    }
	
	//CONNECT-----------------------------------------------------------------------
    function executionSqlSelect($sql) {
		$conn = $this->getConnect();
        $this->result = mysqli_query($conn, $sql);
    }
	
    function executionSql($sql) {
		$conn = $this->getConnect();
        return mysqli_query($conn, $sql);
    }
	
    function getRow($sql) {
		$this->executionSqlSelect($sql);
        return ($this->result)? mysqli_fetch_assoc($this->result) : false;
    }
	
    function getMultiRow($sql, $setArrayPkey=false) {
		$this->executionSqlSelect($sql);
	    if( $this->result == false ) {
            return false;
        }	
        $array = array();
	    while ($row = mysqli_fetch_assoc($this->result)) {
			if ($setArrayPkey) {
				$pkey = $row[$setArrayPkey];
				$array[$pkey] = $row;
			} else {
				$array[] = $row;
			}
	    }
        return $array;
    }
	
    function escape($string) {
		$conn = $this->getConnect();
        if (is_array($string)) {
            foreach ($string as $key => $val) {
                $string[$key] = $this->escape($val);
            }
        } else {
            $string = mysqli_real_escape_string($conn, $string);
        }

        return $string;
    }
	
    function transactionExecution($sql) {
		$conn = $this->getConnect();
        mysqli_autocommit($conn, false);
        $query_success = true;
		
        if (is_array($sql)) {
            foreach ($sql as $query) {
                mysqli_query($conn, $query) ? null : $query_success = false;
                if (!$query_success) {
                    break;
                }
            }
        } else {
            mysqli_query($conn, $sql) ? null : $query_success = false;
        }
		
        ($query_success) ? mysqli_commit($conn) : mysqli_rollback($conn);
        return $query_success;
    }

    function error() {
		$conn = $this->getConnect();
        $error_no = mysqli_errno($conn);
        $error_message = mysqli_error($conn);
        return "Error : {$error_no} : {$error_message}\n";
    }
	
    function selectDb($dbase) {
		$conn = $this->getConnect();
        return mysqli_select_db($conn, $dbase);
    }
	
    public function insertId() {
		$conn = $this->getConnect();
        return mysqli_insert_id($conn);
    }
	
	public function getAffectedCount() {
		$conn = $this->getConnect();
		return mysqli_affected_rows($conn);
	}
	
	public function getByKey($table, $key_name, $key_value) {
		$table     = $this->escape($table);
		$key_name  = $this->escape($key_name);
		$key_value = $this->escape($key_value);
		$sql = "SELECT * FROM {$table} WHERE {$key_name} = '{$key_value}'";
		
		return $this->getRow($sql);
	}
	
	public function isDuplicate($table, $checkArray, $exceptionArray) {
		$table 	    	= $this->escape($table);
		$checkArray 	= $this->escape($checkArray);
		$exceptionArray = $this->escape($exceptionArray);
		
		$tmp = array();
		foreach ($checkArray as $key => $val) {
			$tmp[] = "`{$key}` = '{$val}'";
		}
		$where = implode(' AND ', $tmp);
		$sql = "SELECT * FROM {$table} WHERE {$where}";
		
		if ($exceptionArray) {
			$exceptionArray = $this->escape($exceptionArray);
			
			$tmp = array();
			foreach ($exceptionArray as $key => $val) {
				$tmp[] = "`{$key}` = '{$val}'";
			}
			$not = implode(' OR ', $tmp);
			$sql .= " AND NOT($not)";
		}
		$res = $this->getRow($sql);
		return ($res)? true : false;
	}
	
	public function update($table, $array, $pkey_name, $pkey) {
		
		$array	   = $this->escape($array);
		$table     = $this->escape($table);
		$pkey_name = $this->escape($pkey_name);
		$pkey 	   = $this->escape($pkey);
		
		$tmp = array();
        foreach ($array as $col => $val) {
			//$tmp[] = (ctype_digit($val))? "`{$col}` = {$val}" : "`{$col}` = '{$val}'";
			$tmp[] = "`{$col}` = '{$val}'";
        }
        $setQuery = implode(',',$tmp);
		
		$pkey_name = "`{$pkey_name}`";
		if (!ctype_digit($pkey)) {
			$pkey = "'{$pkey}'";
		}
		
		$sql = '';
        $sql = "UPDATE {$table} "
			 . "   SET {$setQuery} "
			 . " WHERE {$pkey_name} = {$pkey}";
		
        $res = $this->executionSql($sql);
		return ($res)? $this->getAffectedCount() : false;
	}
	
    public function update2($table, $array, $pkey_name, $pkey) {
		
		$array	   = $this->escape($array);
		$table     = $this->escape($table);
		$pkey_name = $this->escape($pkey_name);
		$pkey 	   = $this->escape($pkey);
		
		$tmp = array();
        foreach ($array as $col => $val) {
			//$tmp[] = (ctype_digit($val))? "`{$col}` = {$val}" : "`{$col}` = '{$val}'";
			$tmp[] = "`{$col}` = {$val}";
        }
        $setQuery = implode(',',$tmp);
		
		$pkey_name = "`{$pkey_name}`";
		if (!ctype_digit($pkey)) {
			$pkey = "'{$pkey}'";
		}
		
		$sql = '';
        $sql = "UPDATE {$table} "
			 . "   SET {$setQuery} "
			 . " WHERE {$pkey_name} = {$pkey}";
		
        $res = $this->executionSql($sql);
		return ($res)? $this->getAffectedCount() : false;
	}
        
    public function insert($table, $array) {
		$array = $this->escape($array);
		$table = $this->escape($table);
		
		list($colQuery, $valQuery) = $this->generateInsertColVal($array);
		
		$sql = '';
        $sql = "INSERT INTO {$table} ({$colQuery}) "
			 . "     VALUES ($valQuery)";
		
        return $this->executionSql($sql);
	}
	
	public function delete($table, $pkey_name, $pkey) {
		$table     = $this->escape($table);
		$pkey_name = $this->escape($pkey_name);
		$pkey 	   = $this->escape($pkey);
		
		$pkey_name = "`{$pkey_name}`";
		if (!ctype_digit($pkey)) {
			$pkey = "'{$pkey}'";
		}
		
        $sql = " DELETE FROM {$table} "
			 . "      WHERE {$pkey_name} = {$pkey}";
		
        $res = $this->executionSql($sql);
		return ($res)? $this->getAffectedCount() : false;
	}

    public function delete2($table, $delete_where ) {
        $table     = $this->escape($table);

        $sql = " DELETE FROM {$table} "
            . "      WHERE {$delete_where}";

        $res = $this->executionSql($sql);
        return ($res)? $this->getAffectedCount() : false;
    }
	
    public function insertMulti($table, $multiArray, $return_sql=false) {
        $table = $this->escape($table);
		$multiArray = $this->escape($multiArray);
		
		$tmp = array();
		foreach ($multiArray as $array) {
			list($colQuery, $vals) = $this->generateInsertColVal($array);
			$tmp[] = "({$vals})";
		}
		$valueQuery = implode(",\n", $tmp);

        $sql = "INSERT INTO {$table} ({$colQuery}) \n"
			 . "     VALUES {$valueQuery}";

        return ($return_sql == false)? $this->executionSql($sql) : $sql;
    }
	
    /************************************************************************/
    /* GENERATE QUERY                                                       */
    /************************************************************************/
    private function generateInsertColVal($array) {
	    $cols = array();
        $vals = array();
		foreach ($array as $col => $val) {
			$cols[] = "`{$col}`";
			//$vals[] = (ctype_digit($val))? "{$val}" : "'{$val}'";
			$vals[] = "'{$val}'";
		}
        return array(implode(',', $cols), implode(',', $vals));
    }
	
}